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A kind of bleaching method of silk fabric

A fabric and silk technology, applied in the direction of bleaching products, textiles and papermaking, etc., can solve the problems of bleaching, silk strength decline, oxidation and recoloring, etc., and achieve the effect of stable whiteness

Active Publication Date: 2016-08-24
浙江巨力宝纺织科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For oxidative bleaching agents, there are disadvantages such as unstable whiteness of the fabric after bleaching, that is, oxidative recoloring, while reductive bleaching agents have problems such as environmental pollution.
Since the main silk fibroin of silk fabric is relatively stable to reducing agents, but its ability to resist oxidants is poor
Chlorine-containing bleaching agents cannot be used for bleaching protein fabrics, that is, silk fabrics, because it will cause silk to produce chloramines and cause yellowing, and it will also lead to a decrease in the strength of silk

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Take 2g of 30% H 2 o 2 , 4g of sodium silicate mixed evenly, and assisted with a certain probe ultrasonic, the ultrasonic power is 400W. A certain amount of potassium hydroxide is added to the mixed solution to adjust its pH to 10.5 to obtain a bleaching solution. Take 2g of silk fabric and tie it with polyester thread, soak the silk fabric in the above-mentioned prepared floating solution, raise the temperature to 100°C, steam for 30min, then cool down to 70°C at a rate of 2°C / min, put Drain the bleaching liquid, soak the silk fabric in hot water at 90°C for 20 minutes, then cool down to 70°C, drain the cleaning liquid, and finally soak the silk fabric in cold water for 20 minutes and then discharge the cleaning liquid. The bleaching liquid and cleaning liquid are neutralized with acetic acid to prevent harm to the environment.

Embodiment 2

[0020] Take 2g of 30% hydrogen peroxide and 10g of sodium silicate and mix evenly, and assisted with ultrasound with a certain probe, and the ultrasound power is 400W. A certain amount of potassium hydroxide is added to the mixed solution to adjust its pH to 11 to obtain a bleaching solution. Take 2g of silk fabric and tie it with a polyester thread, soak the silk fabric in the above-mentioned prepared floating solution, raise the temperature to 120°C, steam for 90min, then cool down to 70°C at a rate of 2°C / min, put Drain the bleaching liquid, soak the silk fabric in hot water at 90°C for 20 minutes, then cool down to 70°C, drain the cleaning liquid, and finally soak the silk fabric in cold water for 20 minutes and then discharge the cleaning liquid. The bleaching liquid and cleaning liquid are neutralized with acetic acid to prevent harm to the environment.

Embodiment 3

[0022] Take 2g of 30% hydrogen peroxide and 6g of sodium silicate and mix evenly, and assisted with ultrasound with a certain probe, and the ultrasound power is 400W. A certain amount of potassium hydroxide is added to the mixed solution to adjust its pH to 10.6 to obtain a bleaching solution. Take 2g of silk fabric and tie it with a polyester thread, soak the silk fabric in the above-mentioned prepared floating solution, raise the temperature to 110°C, steam for 50min, then cool down to 70°C at a rate of 2°C / min, put Drain the bleaching liquid, soak the silk fabric in hot water at 90°C for 20 minutes, then cool down to 70°C, drain the cleaning liquid, and finally soak the silk fabric in cold water for 20 minutes and then discharge the cleaning liquid. The bleaching liquid and cleaning liquid are neutralized with acetic acid to prevent harm to the environment.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Abstract

The invention discloses a silk fabric bleaching method, which belongs to the field of silk fabric production. The method has the following steps: prepare the floating liquid, the main component of the floating liquid is 30% H 2 o 2 and stabilizer, ultrasonically stirred and mixed evenly, and the pH value of the solution was adjusted to 10.5-11 by adding alkali; the silk fabric was prepared and tied with a polyester thread; the silk fabric was soaked in the bleaching solution, soaked twice and tied twice, and the temperature was raised to 95-120°C. Steam for a period of time, cool down to 70°C at a rate of 2°C / min, drain the bleach, wash with hot water, drain the cleaning solution after cooling down, neutralize the discharged cleaning solution with acetic acid, and then rinse with cold water. The method can effectively maintain the whiteness and strength of the silk fabric without causing damage to the natural pigment of the silk, and is an environmentally friendly bleaching method.

Description

Technical field: [0001] The invention relates to the field of silk fabric production, in particular to a method for bleaching silk fabrics. Background technique: [0002] Silk is a continuous "long fiber" formed by the solidification of the silk liquid secreted by cooked silkworms when they make cocoons. It is also called "natural silk" and is a natural fiber. Silk is the lightest, softest and thinnest natural fiber in nature. It can easily return to its original shape after the external force is removed. [0003] The main body of silk is silk fibroin, in addition, it also includes natural impurities (sericin, fat wax, pigments, inorganic substances and carbohydrates) and artificial impurities (colorants, oil stains). The pretreatment of silk includes refining and bleaching. Refining is the degumming process of silk. Generally, the impurities in silk are attached to the sericin. Therefore, the degumming process can remove other impurities in silk. [0004] Although the si...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D06L3/02D06L3/00D06L4/12D06L4/13
Inventor 周继东
Owner 浙江巨力宝纺织科技有限公司
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